IGHE and asthma: The primary outcome is the mean change in forced expiratory volume in one-second scores, with secondary outcomes including changes in peak expiratory flow, forced vital capacity, forced expiratory flow 25–75%, fractional exhaled nitric oxide, Asthma Control Test, Asthma Quality of Life Questionnaire, serum IgE, eosinophil count, C-reactive protein, rescue medication usage, and a descriptive analysis of the questionnaire on asthma symptoms in Korean medicine.